Does Zakat become due on the sum of 130 million Algerian centimes if a year has passed and it has reached the Nisab, given that it resulted from the sale of a house, and with it a plot of land was purchased which is experiencing problems and has not been built upon? And what is the ruling concerning a house owned by the father and lent to his brother, who refuses to vacate it after 12 years?

There is no zakat (definition) on a plot of land bought for construction, nor on a house lent for dwelling. As for saved money, if a year has passed on it, zakat is obligatory on it, which is one-quarter of one-tenth, once it reaches the nisab (definition), and it is not permissible to delay it. Regarding the brother who refuses to leave the lent house, he must be advised and it should be clarified that his dwelling without the owner's consent is considered usurpation (ghasb) and makes him sinful.